//
//  MainTabBar.swift
//  微博
//
//  Created by mac on 15/12/13.
//  Copyright © 2015年 itcats. All rights reserved.
//

import UIKit

class MainTabBar: UITabBar {
  
    override init(frame: CGRect) {
        super.init(frame: frame)
        addSubview(composeBtn)
    }

    required init?(coder aDecoder: NSCoder) {
        //fatalError("init(coder:) has not been implemented")
        super.init(coder: aDecoder)
        addSubview(composeBtn)
    }
    override func layoutSubviews() {
        super.layoutSubviews()
        let w = self.bounds.width / 5
        let h = self.bounds.height
        let rect = CGRect(x: 0, y: 0, width: w, height: h)
        //遍历所有子视图
        var index:CGFloat = 0
        for subview in subviews{
            if subview.isKindOfClass(NSClassFromString("UITabBarButton")!){
            subview.frame = CGRectOffset(rect,index * w , 0)
                
                index += (index == 1 ? 2 : 1)
            
            }

        }
        //设置加号按钮的位置
        composeBtn.frame = CGRectOffset(rect, 2*w, 0)
        
    }
    
    //懒加载  加号按钮
    lazy var composeBtn: UIButton = UIButton(imageNmae: "tabbar_compose_icon_add", backImageName: "tabbar_compose_button")
    
    
  
}
